Research progress on the nano-Si/C materials with high capacity for Lithium-iom battery

Abstract: Nano-Si/C composite materials made up of nano-sized Si and carbon, is considered can solve the problem of large volume variation and unstable SEI formation of Si anode upon cycling, which have always impeded the practical application of Si-based anode. Because the carbon can effectively accommodate strain release and stablize the electrode/electrolyde interface. In this report, the recent progress of nano-Si/C materials is briefly introduced. After continuous research and development, the rebounding, efficiency, compaction density and workability of low capacity composite materials (380～450 mA·h·g^-1) has reached the level of state of art commercial graphite material. The cycle and rate performance of high and ultra-high capacity materials (500～2000 mA·h·g^-1) has been significantly improved owing to the sophisticated structure design.